EP 0294911 B1 19921014 - PROCESS FOR THE PREPARATION OF 9(11)-DEHYDRO STEROIDS
Title (en)
PROCESS FOR THE PREPARATION OF 9(11)-DEHYDRO STEROIDS
Publication
Application
Priority
EP 87201122 A 19870612
Abstract (en)
[origin: EP0294911A1] 9(11)-dehydroandrostanes and 9(11)-dehydropregnanes are prepared by dehydrating the corresponding 9-alpha-hydroxy steroid in the presence of a Lewis acid. The corresponding 8(9)-dehydro-isomer was not detectable. The resulting products are valuable intermediates in steroid synthesis especially in the preparation of corticosteroids.
IPC 1-7
IPC 8 full level
C07J 1/00 (2006.01); C07J 3/00 (2006.01); C07J 5/00 (2006.01); C07J 13/00 (2006.01); C07J 41/00 (2006.01); C07J 75/00 (2006.01)
CPC (source: EP US)
C07J 1/0011 (2013.01 - EP US); C07J 3/005 (2013.01 - EP US); C07J 13/005 (2013.01 - EP US); C07J 41/0094 (2013.01 - EP US); C07J 75/00 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0294911 A1 19881214; EP 0294911 B1 19921014; CA 1294952 C 19920128; CN 1029975 C 19951011; CN 1030240 A 19890111; DE 3875280 D1 19921119; DE 3875280 T2 19930429; ES 2043785 T3 19940101; GR 3006132 T3 19930621; HU 203114 B 19910528; HU T47306 A 19890228; IE 62526 B1 19950208; IE 881751 L 19881212; JP 2584829 B2 19970226; JP S6413098 A 19890117; PT 87687 A 19880701; PT 87687 B 19920930; US 4917827 A 19900417; ZA 884167 B 19890329
DOCDB simple family (application)
EP 88201210 A 19880613; CA 569360 A 19880613; CN 88103495 A 19880611; DE 3875280 T 19880613; ES 88201210 T 19880613; GR 920401196 T 19921104; HU 301188 A 19880610; IE 175188 A 19880610; JP 14341388 A 19880610; PT 8768788 A 19880609; US 20472088 A 19880610; ZA 884167 A 19880610